Watertight electrical compartment for use in irrigation devices and methods of use

ABSTRACT

A watertight electrical compartment for use in an irrigation device can include a compartment body with a chamber, a sealing section mounted with one or more sealing rings, and external threads. A sealing cap mate with the sealing section and/or the sealing rings to seal the chamber. A cap retainer can be advanced over at least a portion of the sealing cap and can have internal threads to be screwed onto the external threads of the compartment body. The cap retainer can also have a stopping feature to keep the sealing cap in its sealed position. The watertight electrical compartment can be used in a wireless flow sensor assembly, a battery operated irrigation controller, and/or a battery-operated central controller device, to provide irrigation control, and/or sensor information, without the need for AC power.

FIELD OF THE DISCLOSURE

This disclosure relates to irrigation devices, and more particularly, toa watertight electrical compartment for sealing a compartment to be usedin irrigation devices against the entry of water, mud, sand, dirt andthe like.

BACKGROUND

An automatic irrigation device saves time, water, and money. Flowsensors are typically used to measure the amount of water flowingthrough an automated irrigation device. The flow sensor is normallyconnected to a mainline pipe that provides water to irrigation valves.The flow sensor is also wired to a terminal on an irrigation controllerto transmit information about the amount of water that has flowed pastthe sensor to the controller. The controller may be connected to anelectrical circuit that operates a solenoid attached to each irrigationvalve and normally determines watering start and stop times. In someirrigation devices, the flow sensor can also automatically shut down theirrigation device if an overflow condition occurs.

Subterranean plastic valve boxes are commonly used for mountingirrigation valves, the flow sensor, and pipes of an irrigation device.The irrigation valve box makes it easier to repair and replace theirrigation device. The box can be covered by a plastic lid to preventwater, mud, dirt and the like from entering the box. In someenvironments, however, water, dirt, mud, and other environmental hazardsmay enter the box and gain access to the sensors, valves, and/or othercomponents therein.

SUMMARY

There are situations in which obtaining AC power supply is not availableor wiring the flow sensor to the controller is impractical orimpossible. Examples of those situations include, but are not limitedto, isolated sites, power-restricted areas, municipalities whereunderground power lines have not been laid, newly developed houses wherepower supply is not yet available, mines, and forests after a forestfire. In those situations, a battery operated controller may beadvantageously used to provide irrigation without the need for powerconnections. Further, in an area where a large number of batteryoperated controllers are installed and managed by a single entity, it isinconvenient for the service crew to individually turn on and off eachirrigation device. For example, all the irrigation devices may need tobe turned off during the rain and to be turned back on after the rain.There may also be need to reprogram the watering times of eachcontroller as weather patterns change throughout the year. Accordingly,there is a need to provide a wireless battery-operated central controldevice to centrally manage all the battery operated irrigation devicesin the area from a central computer. A wireless battery-operated centralcontrol device may include a controller to turn irrigation valves on andoff.

There are situations in which it is impractical to physical wire a flowsensor to an irrigation controller. Examples of these may be wherehardscapes, building, mature landscaping, roadways, or water in the formof ponds, pools, or streams may be in the path of the proposed wiringwhich may substantially inhibit a user's ability to run the wiring. Inthose situations, a wireless flow sensor assembly may be used inconjunction with other irrigation devices to provide feedback regardingthe operation of an irrigation system. The wireless flow sensor can bepowered by battery that is housed in a separate compartment andelectrically connected to the flow sensor. The battery can be replacedevery one to three years.

In these applications, wireless communication can use radiofrequencysignals or other known wireless technology.

Both the wireless flow sensor assembly (WFS) and the battery-operatedcentral control device (BOCC) can include an antenna or a transmitterthat may need to be installed above the ground in order to transmitand/or receive signals. The WFS and the BOCC can be mounted inside thevalve box with the antenna or transmitter extending above the groundthrough a hole cut in the plastic lid for transmitting and/or receivingsignals.

The valve boxes are often flooded during rain or irrigation.Additionally, it is common for gophers or other animals to back fill theboxes so that the boxes are filled with mud and dirt, essentiallyburying the devices inside. It is important that water or mud enteringthe box does not get inside the electrical compartment to interfere withnormal functioning of the battery or other electronic components insidethe electrical compartment. Accordingly, there is a need for awatertight electrical compartment that can prevent entry of water, mud,dirt and the like.

Having one or more sealing rings, such as O-rings, between an electricalcompartment body and a sealing cap can be effective in sealing theelectrical compartment. Nevertheless, the friction between the sealingring and the sealing cap makes it difficult to screw the sealing caponto the compartment body. Likewise, once the cap has been tightlyscrewed onto the compartment body, the sealing ring makes it difficultto unscrew the cap, thereby making it difficult to reopen the electricalcompartment. However, as mentioned above, the battery in the electricalcompartment may need to be replaced every one to three years; otherelectronic components that can be housed in the electrical compartmentmay also require servicing at intervals. Accordingly, there is a needfor a watertight electrical compartment that has easy-to-open sealingfeatures for replacing the battery or servicing the electricalcomponents housed inside the compartment.

According to some embodiments, a watertight electrical compartment foruse in an irrigation device can include an electrical compartment body,at least one sealing ring, a cap, and a cap retainer. The electricalcompartment body can comprise a chamber with an open end, and an outerwall surface having external threads and a sealing section, the sealingsection located closer to the open end of the chamber than the externalthreads. The at least one sealing ring can have a diameter configuredfor mounting on the sealing section. The cap can have an open end, aclosed end, and an internal diameter configured to have a sliding fitwith the sealing section and an interference fit with the sealing ringwhen the sealing ring is mounted on the sealing section. The capretainer can have internal threads configured to threadedly mate withthe external threads of the compartment body, the cap retainer furtherhaving first and second ends, the cap retainer configured to receive atleast a portion of the cap through the first end. In some embodiments,the compartment can be configured to be electrically coupled to a flowsensor.

In some embodiments, the cap can further include a non-threaded innerwall. In some embodiment, the cap can have a reduced outer diameter onits closed end and the cap retainer has a reduced inner diameter on itssecond end, the reduced inner diameter of the cap retainer configured toslidably accommodate the reduced outer diameter of the cap. In someembodiments, a wall of the cap can further comprise at least one notchat the open end.

In some embodiments, the cap retainer can have an inner wall comprisinga non-threaded portion further away from the first end of the capretainer than the inner threads. In some embodiments, the cap retainercan have a shoulder at its second end having an internal diametersmaller than an outer diameter of the cap. The shoulder can beconfigured to keep the cap engaged with the sealing section when theinternal threads of the cap retainer mates with the external threads ofthe compartment body.

In some embodiments, the sealing section can further comprise at leastone groove configured to receive the at least one sealing ring. In someembodiments, the watertight electrical compartment can further aplurality of sealing rings positioned between the cap and the outer wallsurface of the electrical compartment body. In some embodiments, thesealing ring can be resilient.

In some embodiments, the chamber of the compartment body can beconfigured to house at least one battery. In some embodiments, thechamber can comprise battery contacts. In some embodiments, the chambercan comprise a DIP switch. In some embodiments, the chamber can compriseflash programming pads.

In some embodiments, the watertight electrical compartment can furtherinclude an electrical wire extending through the closed end of the capand the cap is sealed after the wire has passed through the cap.

According to some embodiments, a method of sealing a watertightelectrical compartment for use in an irrigation device can includeproviding an electrical compartment body comprising a chamber with anopen end, an outer wall surface having external threads and a sealingsection, the sealing section located closer to the open end of thechamber than the external threads; mounting at least one sealing ringonto the sealing section; sliding a cap having an open end and a closedend over the sealing section through the open end, the cap having aninternal diameter configured to have a sliding fit with the sealingsection, wherein an inner wall of the cap compresses the sealing ringmounted on the sealing section; sliding a cap retainer having first andsecond ends over at least a portion of the cap through the first end ofthe cap retainer, the cap retainer having a stopper on the second endfor retaining the cap, the cap retainer further having internal threads;and turning the cap retainer so that the internal threads mate with theexternal threads of the compartment body to keep the cap in a sealedposition. In some embodiments, the method of sealing a watertightelectrical compartment for use in an irrigation device can furtherinclude mounting a plurality of sealing rings onto the sealing section.In some embodiments, sliding the cap retainer over at least a portion ofthe cap can comprise advancing the internal threads of the cap retainerpast the cap towards the external threads of the compartment body.

All of these embodiments are intended to be within the scope of thedisclosure herein. These and other embodiments will become readilyapparent to those skilled in the art from the following detaileddescription having reference to the attached figures, the disclosure notbeing limited to any particular disclosed embodiment(s).

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of the presentdisclosure are described with reference to the drawings of certainembodiments, which are intended to schematically illustrate certainembodiments and not to limit the disclosure.

FIG. 1 is an exploded view of an embodiment of a watertight electricalcompartment.

FIG. 2 is a cross-sectional view of an embodiment of a watertightelectrical compartment.

FIG. 3 is a perspective view of an embodiment of a wireless flow sensorassembly (WFS) having a watertight electrical compartment.

FIGS. 4A-F are top, bottom, front, back, left and right views of the WFSassembly of FIG. 3.

FIG. 5 is an exploded view of the WFS assembly of FIG. 3 with the flowsensor and the lid retainer nut removed for clarity.

FIG. 6A is a cross-sectional view of the watertight electricalcompartment of the WFS assembly of FIG. 3.

FIG. 6B is a detailed view illustrating the sealing features of thewatertight electrical compartment of FIG. 6A.

FIG. 7 is a top view of a compartment body of the watertight electricalcompartment of the WFS assembly of FIG. 3.

FIGS. 8A-D are perspective, top, side, and bottom views of an embodimentof a battery-powered irrigation controller.

FIG. 9 is an exploded view of the battery-powered irrigation controllerof FIGS. 8A-D.

FIG. 10 is a perspective view of an embodiment of a battery-poweredcentral controller device (BOCC) including a watertight electricalcompartment for use in an irrigation device.

FIGS. 11A-F are top, bottom, front, back, left and right views of theBOCC of FIG. 10.

FIG. 12 is an exploded view of the BOCC of FIG. 10.

FIG. 13 is a cross-sectional view of the electrical compartment, thetransmitter housing, and the antenna of the BOCC of FIG. 10.

FIG. 14 is a perspective view of an embodiment of a sealing cap in awatertight electrical compartment with an electrical wire coupled to thesealing cap.

DETAILED DESCRIPTION

Although certain embodiments and examples are described below, those ofskill in the art will appreciate that the disclosure extends beyond thespecifically disclosed embodiments and/or uses and obvious modificationsand equivalents thereof. Thus, it is intended that the scope of thedisclosure herein disclosed should not be limited by any particularembodiments described below.

Watertight Electrical Compartment

FIG. 1 shows an embodiment of a watertight electrical compartment 10 tobe used in an irrigation device. The watertight electrical compartment10 can comprise an electrical compartment body 100, a sealing ring 120,a sealing cap 140, and/or a cap retainer 160. The electrical compartmentbody 100, the sealing cap 140, and the cap retainer 160 can be made ofany material suitable for environments exposed to water, mud, dirt, andthe like, such as plastic materials. The compartment body 100, thesealing cap 120, and the cap retainer 160 can be made of the samematerial or different materials. The electrical compartment 10 can be ofany size depending on a user's need.

In some embodiments, the sealing ring 120 can be mounted on the sealingsection 114 of the compartment body 100. The sealing cap 140 can matewith the sealing section 114 and/or the sealing ring 120 to seal thecompartment body 100. The cap retainer 160 can connect to thecompartment body 100 and retain the sealing cap 140 in a sealed positionbetween the cap retainer 160 and the compartment body 100.

As shown in FIG. 1, the electrical compartment body 100 can becylindrically shaped with an first (e.g., open) end 102 and a second(e.g., closed) end 106. The shape of the compartment body 100 is notlimiting. For example, in some cases, the compartment body 100 has apolygonal cross-section, an elliptic cross-section, or some other shape.The compartment body 100 can further comprise a wall 104 between theopen and closed ends 102, 106. The wall 104 can have different/varyingthicknesses from the open end 102 to the closed end 106. An inner wallsurface 110 and the closed end 106 can define a chamber 112. In theillustrated embodiment, the chamber 112 can be cylindrically shaped. Inother embodiments, the chamber 112 can have other shapes, such as, forexample, rectangular or conical. In the illustrated embodiment, theinner wall surface 110 and the closed end 106 can be smooth. In otherembodiments, the inner wall surface 110 and the closed end 106 can haveirregular surfaces.

In some embodiments, the chamber 112 can house a battery. In thoseembodiments, the chamber 312 can have battery contacts (e.g., the battercontacts 3120 as shown in FIG. 7). In some embodiments, the chamber 312can also house electronic components or circuitry, for example, DIPswitch 3124 (shown in FIG. 7), flash programming pads 3122 (shown inFIG. 7), memory cards, and the like. The type of electronic componentsor circuitry housed in the chamber 112 is not limiting. Electroniccomponents or circuitry can be embedded at the bottom of the chamber112, in the inner wall surface 110 of the chamber 112, and/or in someother location. The location of the electronic components in the chamber112 is not limiting.

Turning back to FIG. 1, a sealing section 114 can be located on an outerwall surface 108 of the compartment body 100 near the open end 102. Thewall 104 can have a first outer diameter at the sealing section 114. Insome embodiments, the sealing section 114 can have one or more grooves116 on the outer wall surface 108, each groove 116 configured to receiveone or more sealing rings. In some embodiments, the sealing section 114can have a plurality of grooves 116, each groove configured forreceiving a sealing ring 120. On the outer wall surface 108, externalthreads 118 can be located further away from the open end 102 than thesealing section 114. The external threads 118 can have a major diameterthat is greater than the first outer diameter of the wall 104 at thesealing section 114. In the illustrated embodiment, a different betweenthe major diameter of the external threads 118 and the first outerdiameter of the wall 104 is large enough to accommodate a wall thicknessof the cap 140. In some embodiments, the external threads can be customthreads having any desired size and/or tolerance. In the illustratedembodiment, the external threads 118 can be separate from the sealingsection 114 so as not to interfere and/or overlap with the sealingsection 114. A portion of the compartment body 100 near the closed end106 can have a third outer diameter that is substantially the same orgreater than the major diameter of the external threads 118. The thirdouter diameter can be substantially the same as an outer diameter of thecap retainer 160 to advantageously provide a smooth and estheticallypleasing outer shape of the sealed electrical compartment 10. In someembodiments, portions of, or the entire third outer diameter are smallerthan the major diameter of the external threads 118 and/or smaller thanthe outer diameter of the cap retainer 160.

With continued reference to FIG. 1, the sealing ring 120 can have aninner diameter configured for being received by the sealing section 114.In the illustrated embodiment, the sealing ring 120 can have an innerdiameter configured for a tight fit between the sealing ring 120 and thegroove 116. The sealing ring 120 can also have an outer diameter that isgreater than the first outer diameter of the wall 104 at the sealingsection 114. When the sealing ring 120 is received at the sealingsection 114, a portion of the sealing ring 120 can extend radiallyoutward from the outer wall surface 108 at the sealing section 114. Theprecise extent to which the sealing ring 120 extends out from thegrooves 116 is not limiting. In some embodiments, the sealing ring 120can be resilient. In some embodiments, the sealing ring 120 can be madefrom elastomeric materials. For example, the sealing ring 120 can be anO-ring. The resilient sealing ring 120 can advantageously conform to aspace between the outer wall 104 of the compartment body 100 and aninner wall surface 142 (shown in FIG. 2) of the sealing cap 140 when thesealing cap 140 slides over the sealing section 114, thereby providingeffective sealing of the electrical compartment 10. In some embodiments,one sealing ring 120 can be used. In other embodiments, a plurality ofsealing rings can be used. In some embodiments, grease can be applied onthe sealing ring 120 to allow the sealing cap 140 to slide smoothly overthe sealing ring 120 mounted on the sealing section 114 and/or to reducewear on the sealing ring 120.

As shown in FIG. 1, the sealing cap 140 can be cylindrically shaped,although the shape of the sealing cap 140 is not limiting. The sealingcap 140 can have a first (e.g., open) end 144, a second (e.g., closed)end 146, and a wall 148 between the open and closed ends 144, 146.

More details of the sealing cap 140 will now be described with respectto FIG. 2. FIG. 2 shows a cross-sectional view of a watertightelectrical compartment 20. The electrical compartment 20 is similar tothe electrical compartment 10 except that that the electricalcompartment 20 can have two sealing rings 120. Accordingly, features ofthe electrical compartment 20 can be incorporated into features of theelectrical compartment 10 and features of the electrical compartment 10can be incorporated into features of the electrical compartment 20.

As shown in FIG. 2, an inner wall surface 142 of the cap 140 can have aninternal diameter configured to have a sliding fit with the sealingsection 114 and an interference fit with the sealing ring 120 when thesealing ring 120 is mounted on the sealing section 114. Also as shown inFIG. 2, the sealing ring 120 can be compressed between the groove 116and the inner wall surface 142 of the sealing cap 140. In theillustrated embodiments, the inner wall surface 142 is not threaded.Turning back to FIG. 1, the wall 148 of the sealing cap 140 has agreater outer diameter near its open end 144 than at its closed end 146.As mentioned above, the thickness of the wall 148 can be defined by thedifference between the greater outer diameter and the internal diameterand can be smaller than the difference between the major diameter of theexternal threads 118 and the first outer diameter of the wall 104 of thecompartment body 100. With reference to FIGS. 1-2, when the sealing cap140 fits over the sealing section 114 of the compartment body 100, anouter wall surface 149 of the sealing cap 140 can be located radiallyinward from the major diameter of the external threads 118, therebyadvantageously inhibiting or preventing the sealing cap 140 fromblocking the cap retainer 160 from moving at least partially past thesealing cap 140 toward the second end 106 of the compartment body 100.The outer wall surface 149 also has a reduced-diameter portion 150extending from the closed end 146 toward the open end 144. In someembodiments, the reduced-diameter portion 150 can have a height of about0.1″ to 0.5″. In some embodiments, the reduced-diameter portion 150 canhave a height of about 0.15″. In the illustrated embodiments, thereduced-diameter portion 150 can be cylindrical with a substantiallyuniform diameter. In other embodiments, the reduced-diameter portion 150can be tapered, with the diameter increasing, e.g. gradually, from theclosed end 146 toward the open end 144. In some embodiments, the sealingcap 140 can have one or more notches 152 at the open end 144. Thenotches 152 can advantageously allow the cap 140 be pried open, e.g.with a screw driver or other tool, in case the cap 140 is stuck duringremoval of the cap 140 from the compartment body 100 to reopen thesealed compartment 10.

With continued reference to FIG. 1, the cap retainer 160 can becylindrically shaped, although the shape of the cap retainer 160 is notlimiting. The cap retainer 160 can have a first end 162, a second end164, and a wall 166 between the first and second ends 162, 164. An innerwall surface 168 of the cap retainer 160 can have internal threads 170configured to threadedly mate with the external threads 118 of thecompartment body 100. In some embodiments, the internal threads 170 canbe located near the first end 162 (e.g., nearer the first end 162 thanthe second end 164). Having the internal threads 170 on the cap retainer160 instead of on the sealing cap 140 can advantageously allow easyturning of the cap retainer 160 because the sealing cap 140 can coverthe sealing ring 120 from the cap retainer 160. For example, thethreaded engagement between the cap retainer 160 and component body 100can be separate from the sealed engagement between the cap 140 and thebody 100. The internal threads 170 can be custom threads having anydesired size and/or tolerance. The inner wall surface 168 can have aninternal diameter that is bigger than the greater outer diameter of thesealing cap 140. In some embodiments, the cap retainer 160 and thesealing cap 140 can have a sliding fit. The sliding fit can allow thecap retainer 160 and the sealing cap 140 to rotate and/or move easilyagainst each other. In some embodiments, the cap retainer 160 and thesealing cap 140 can have a running fit. The running fit can allow thecap retainer 160 and the sealing cap 140 to rotate and/or move freelypast each other.

In the illustrated embodiment, the inner wall surface 168 can also havea non-threaded portion further away from the first end 162 of the capretainer 160 than the internal threads 170. The non-threaded portion canadvantageously allow the cap retainer 160 to smoothly move over at leasta portion of the sealing cap 140. In the illustrated embodiment, thesecond end 164 of the cap retainer 160 can have an opening 172surrounded by a shoulder 174. The opening 172 can have a diameter thatis greater than the reduced diameter of the reduced-diameter portion 150of the sealing cap 140, but less than the greater diameter of thesealing cap 140. As shown in FIG. 2, when the cap retainer 160 isadvanced from the closed end 146 of the sealing cap to its open end 144,the reduced-diameter portion 150 of the sealing cap 140 can pass throughthe opening 172, when the rest of the sealing cap 140 can be stoppedfrom exiting the opening 172 by the shoulder 174. A depth of the opening172 can be defined by a thickness of the cap retainer 160 at the secondend 164. In some embodiments, the depth of the opening 172 can be about0.1″ to 0.5″. In the illustrated embodiment, the depth of the opening172 is the substantially same as the height of the reduced-diameterportion 150 of the sealing cap 140 so that the closed end 146 of thesealing cap 140 can be substantially flush with the second end 164 ofthe cap retainer 160, resulting in a smooth and esthetically pleasingshape of the electrical compartment 10 when the electrical compartment10 is sealed. Also as shown in FIG. 2, the opening 172 through thesecond end 164 has a substantially uniform diameter. In otherembodiments, the opening 172 can be tapered, with the diameterincreasing (e.g. gradually increasing) from the second end 164 towardthe first end 162. In yet other embodiments, the opening 172 can haveone or more raised bumps or grooves to snap onto one or morecorresponding grooves or raised bumps on the reduced-diameter portion150 of the sealing cap 140. In some embodiments, the second end 164 canbe closed to retain the sealing cap 140.

The embodiment of watertight electrical compartments 10, 20, as shown inFIGS. 1-2 can advantageously provide effective sealing via the sealingring 120 between the compartment body 100 and the sealing cap 140, whilestill allowing easy turning of the cap retainer 160, which is separatefrom the sealing cap 140 and not subject to the friction provided by thesealing ring 120. The cap retainer 160 can retain the sealing cap 140 ina sealed position by the mating of the internal threads 170 on the capretainer 160 and the external threads 118 on the compartment body 100.The cap retainer 160 can also be easily screwed on and off from thecompartment body 100 to allow replacement and/or servicing of theelectrical components housed inside the chamber 112.

Turning back to FIG. 1, the outer wall surface 108 near the closed end106 of the compartment body 100, the outer wall surface 149 near theclosed end 146 of the sealing cap 140, and/or an outer wall surface 167near the second end 164 of the cap retainer 160 can further have arugged or textured surface to increase friction between the outer wallsurface and a user's hand for easy gripping. In other embodiments, theentire outer wall surfaces 108, 149, 167 can be rugged or textured. Inthe illustrated embodiment, the outer wall surfaces 108, 149, 167 canhave a plurality of vertical indentations extending down a portion ofthe outer wall surfaces 108, 149, 167. In other embodiments, the outerwall surfaces 108, 149, 167 can be corrugated. In yet other embodiments,the outer wall surfaces 108, 149, 167 can have raised pumps.

In some embodiments, a modified watertight electrical compartment can besimilar to the electrical compartment 10 and can have features of theelectrical compartment 10 except as described below. The modifiedelectrical compartment can have a compartment body with a smooth outerwall surface near its open end 102 and a sealing cap 140 with a sealingsection on its inner wall for receiving at least one sealing ring.

Methods of Sealing a Watertight Electrical Compartment

Methods of sealing a watertight electrical compartment, such as theelectrical compartments 10, 20 of FIGS. 1-2 will now be described. Theelectrical compartment body 100 as described above can be provided forhousing electronic components and/or circuitry in its chamber 112. Asealing ring 120 can be mounted on the sealing section 114. As shown inFIG. 2, a plurality (e.g., two or more) of sealing rings 120 can bemounted on the sealing section 114. In some embodiments, the sealingring 120 can be resilient, for example, an O-ring. The sealing ring 120can be slightly expanded by a radially outward force to clear the firstouter diameter of the compartment body 100 and then advanced from theopen end 102 of the compartment body 100 to the sealing section 114. Theradially outward force on the sealing ring 120 can then be released sothat the sealing ring 120 can form a tight fit with the sealing section114. In some embodiments, the sealing ring 120 can form a tight fit withthe groove 116 of the sealing section 114. In some embodiments, aplurality of the sealing rings can be mounted on one groove (not shown).In some embodiments, there may be more than one groove 116 with onesealing ring 120 in each groove 116.

With continued reference to FIGS. 1-2, the sealing cap 140 as describedabove can be placed over the sealing section 114. The sealing section114 can be directed through the open end 144 of the sealing cap to reacha sealed position. The inner wall surface 142 of the sealing cap 140 canslide over the outer wall surface 108 of the sealing section 114. Insome embodiments, the inner wall surface 142 of the sealing cap 140 cancompress the sealing ring 120 mounted on the sealing section 114 as thesealing cap 140 moves over the sealing section 114. The compressedsealing ring 120 can advantageously conform to any space between theinner wall surface 142 of the sealing cap 140 and the outer wall surface108 of the sealing section 114, thereby sealing the space. In someembodiments, the sealing ring(s) can be positioned on the inner wallsurface 142 (e.g., in grooves) prior to mating the cap 140 with thesealing section 114.

With the sealing cap 140 in the sealed position, the cap retainer 160 asdescribed above can be advanced over the sealing cap 140. For example,the sealing cap 140 can pass through the first end 162 of the capretainer 160. As described above, the wall thickness of the sealing cap140 can allow the outer wall surface 149 of the sealing cap 140 to belocated radially inward of the outer wall surface 108 at the majordiameter of the external threads 118. The cap retainer 160 can thus beadvanced over at least a portion of the sealing cap 140 unhindered. Insome embodiments, the cap retainer 160 can be advanced over at least aportion of the sealing cap 140 unhindered until the internal threads 170of the cap retainer 160 reach the external threads 118 of thecompartment body 100.

The cap retainer 160 can be turned so that the internal threads 170 canmate with the external threads 118 of the compartment body 100 to lockthe cap retainer 160 on the compartment body 100. The cap retainer 160can also have a stopper on the second end 164 for preventing the sealingcap 140 from disengaging the sealing section 114 and/or the sealing ring120, thereby locking the sealing cap 140 in the sealed position. Asshown in FIGS. 1-2, the stopper can comprise the shoulder 174 asdescribed above so that only the reduced-diameter portion 150 of thesealing cap 140 can pass through the opening 172 and the rest of thesealing cap 140 can be stopped from moving through the opening 172 bythe shoulder 174 because the opening 172 can be smaller than the greaterouter diameter of the sealing cap 140. However, one of ordinary skill inthe art should appreciate from the disclosure herein that other types ofstopper can be used to keep the sealing cap 140 in the sealed position.In some embodiments, the shoulder 174 contacts the major-diameterportion of the sealing cap 140 before all the internal threads 170 canengage the external threads 118. In other embodiments, the shoulder 174can just contact the major-diameter portion of the sealing cap 140 asall the internal threads 170 have substantially engaged the externalthreads 118.

Wireless Flow Sensor Assembly (WFS)

Example applications for a watertight electrical compartment, such asthe electrical compartments 10,20 as shown in FIGS. 1-2, will now bedescribed. In some embodiments, the electrical compartment 30 can beused in a wireless flow sensor assembly (WFS) in FIGS. 3-5. Theelectrical compartment 30 is similar to the electrical compartments 10,20 of FIGS. 1-2 except as described below. Accordingly, features of theelectrical compartment 30 can be incorporated into features of theelectrical compartments 10, 20 and features of the electricalcompartments 10, 20 can be incorporated into features of the electricalcompartment 30.

As shown in FIGS. 3 and 4A-4F, the WFS assembly 3 can include thewatertight electrical compartment 30, an antenna dome 330, a lidretainer nut 35, a flow sensor retainer cap 36, a flow sensor 32, and/oran electrical wire 34 connecting the flow sensor 32 and the electricalcompartment 30. In some embodiments, two or more components in theassembly communicate via wireless connection. The sealing cap 340,sealing retainer 360, and sealing section 314 (shown in FIG. 5) of thecompartment body 300 can operate in the same or in a similar manner tothe operation of the sealing cap 140, sealing retainer 160, and sealingsection 114 of the compartment body 100 described above.

As shown in FIG. 3, the flow sensor 32 can have an impeller 3200 on afirst end 3202. The flow sensor 32 can also be electrically coupled tothe wire 34 at a second end 3204. The flow sensor 32 can be installed ona water line (e.g., into a T-connector perpendicular to a main waterpipe that supplies water to an irrigation device). The flow sensorretainer 36 can retain the sensor 32 onto the T-connector. In theillustrated embodiment, the wire 34 can pass through a hole 3600 of theflow sensor retainer 36. The impeller 3200 can turn as the water flowsthrough the pipe. The flow sensor 32 can generate a signal at intervalsor continuously based on the amount of flow. For example, the flowsensor 32 can generate a signal each time a predetermined volume ofwater has flowed past the sensor 32. The signal can be sent in a mannerdescribed below to an irrigation controller (not shown) that caninterpret and respond to the signal data from the sensor 32.

As described above, the wire 34 can electrically couple the flow sensor32 and the electrical compartment 30. FIG. 5 illustrates an explodedview of the electrical compartment 30. As shown in FIG. 5, a chamber 312of the compartment body 300 can house a battery holder 38 or 39. In someembodiments, the battery holder 38 may house a “D” size battery. In someembodiment's, the battery holder 39 may hold one or more “AA” sizedbatteries. In some embodiments, the battery holder 39 may hold three“AA” size batteries. Other battery holders holding different sizedbatteries could be used. In some embodiments, the chamber 312 holds abattery without a separate holder. In the illustrated embodiment, thebattery holders 38, 39 can have a shape complementary to a shape of thechamber 312 to advantageously minimize movements of the battery holders38, 39 inside the chamber 312. The battery holders 38, 39 can also havetwo protruding longitudinal ridges 380, 390 that are not uniformlyspaced around a circumference of the battery holders 38, 39. The chamber312 can have two longitudinal notches 3126 located on the inner wallsurface 310 and having substantially the same spacing as the ridges 380,390. The ridge-notch configuration can guide a user to insert thesubstantially cylindrical battery holders 38, 39 into the chamber 312only in one orientation. As shown in FIG. 5, the battery holders 38, 39can have flat protrusions 384, 394 for easier holding of the batteryholders 38 or 39 when assembling the WFS assembly 3. In someembodiments, the ridge-notch configurations of the holders 38, 39 andchamber 312 permit installation of the holders 38, 39 in a plurality ofrotational orientations with respect to the chamber 312. In someembodiments, the chamber 312 may only have one notch 3126. In someembodiments, battery holders 38, 39 may only have one ridge 380, 390.

Once the battery in the battery holder 38- or 39 is positioned in thechamber 312, the electrical compartment 30 can be sealed using the cap340 and retainer 360 in a manner described above with respect to cap 140and retainer 160. As shown in FIGS. 6A and 6B, the inner wall surface342 of the sealing cap 340 can compress the sealing ring 320, e.g. twoO-rings, against the sealing section 314, such as the grooves 316, ofthe compartment body 300. The cap retainer 360 can be advanced over atleast a portion of the sealing cap 340. The shoulder 374 of the capretainer 360 can inhibit the sealing cap 340 from moving through theopening 372 of the cap retainer 360 and disengaging the sealing section314 and/or the sealing ring 320 when the cap retainer 360 is mated withthe compartment body 300. The internal threads 370 of the cap retainer360 can mate with the external threads 318 of the compartment body 300to lock the sealing cap 340 in its sealed position.

Turning to FIG. 7, the chamber 312 can have battery contacts 3120 at itsclosed end. As described above, in some embodiments, the battery can beloaded into the chamber 312 in only one orientation. The particularorientation of the battery can advantageously allow terminals of thebattery to be in contact with the battery contacts 3120 when loaded intothe chamber 312. The chamber 312 can also have a DIP switch 3124 andflash programming pads 3122. The battery, the DIP switch 3124, and theflash programming pads 3122 can be electrically connected, e.g. in anelectrical circuit, with the battery providing power to the circuit. Asshown in FIG. 5, the wire 34 can exit the compartment body 300 at alocation between the open and closed ends 302, 306. The wire 34 can beelectrically coupled to the battery contacts 3120 so that the batterycan advantageously provide power to the flow sensor 32. The wire canalso send the signals from the flow sensor 32 to the electrical circuitinside the chamber 312. The signals can then be transmitted wirelesslyto an irrigation controller (not shown), thereby eliminating a possibleneed to physically wire the flow sensor 32 to the irrigation controller.The WFS assembly 3 can also have an antenna 330 to facilitatetransmitting and/or receiving signals. In the illustrated embodiment,the antenna 330 can be dome-shaped and be attached to the closed end 306of the compartment body 300. In some embodiments, the antenna dome 330can also receive signals, e.g. from the controller, a remote control,and/or a computer. In some embodiments, the antenna dome 330 can bothtransmit and receive signals. The antenna dome 330 can communicatedwirelessly with another electronic device, such as the controller,intermittently or continuously.

Turning back to FIG. 3, the lid retainer nut 35 can be used to mount theelectrical compartment 30 and the antenna dome 330 on a plastic lid of avalve box (not shown), in which the flow sensor 32 can be installed.Specifically, the outer wall surface 308 of the compartment body 300 canhave external threads 309. As shown in FIG. 3, the external threads 309can be located between the external threads 318 and the antenna dome330. The lid retainer nut 35 can have internal threads (not shown) thatcan threadedly mate with the external threads 309 of the compartmentbody 300. In some embodiments, the external threads 309 can be customthreads having any desired size and/or tolerance. For installation, thesealed electrical compartment 30 can be passed through a hole on the lid(not shown). The antenna dome 330 can be located on an outer surface ofthe lid and can have a diameter that is bigger than the hole on the lidso that an undersurface 332 (shown in FIG. 5) of the dome 330 can reston the outer surface of the lid. The lid retainer nut 35 can be advancedfrom the sealed open end 302 of the compartment body 300 toward the dome330, while the internal threads of the lid retainer nut 35 can engagethe external threads 309. The lid retainer nut 35 can stop advancingtoward the dome 330 when the lid retainer nut 35 contacts an innersurface of the lid. In some embodiments, the lid retainer nut 35 can beturned another quarter to a half turn after the lid retainer nut 35touches the inner surface of the lid to advantageously fix the lidbetween the dome 330 and the lid retainer nut 35.

To reopen the installed electrical compartment 30, the lid can be liftedopen and turned over to exposed the sealed open end 302. The capretainer 360 can be unscrewed from the compartment body 300. The capretainer 360 can be easily unscrewed, not needing to overcome thefriction of the sealing ring 320. The sealing cap 340 can then be pulledaway from the compartment body 300. A tool such as a screwdriver can beused to pry open the sealing cap 340 at the notches 352 (shown in FIG.5) if the sealing cap 340 gets stuck with the sealing ring 320. Once theelectrical compartment 30 is reopened, the batteries can be replacedand/or electronic circuitry can be serviced.

Battery-Operated Controller

In some embodiments, the watertight electrical compartment can beincorporated into an irrigation controller to make a battery-operatedcontroller 80 shown in FIGS. 8A-D and 9. The battery operated controller80 is similar to the electrical compartments 10, 20 of FIGS. 1-2 exceptas described below. Accordingly, features of the battery operatedcontroller 80 can be incorporated into features of the electricalcompartments 10, 20 and features of the electrical compartments 10, 20can be incorporated into features of the battery operated controller 80.

As shown in FIG. 9, the battery operated controller 80 can include acompartment body 800 having a chamber 812, a sealing section 814, and/orexternal threads 818. The chamber 812 can accommodate batteries 892(e.g., DC batteries). In the illustrated embodiment, the chamber 812 canhave a shape that is complementary to a shape of the batteries 892 tominimize movement of the batteries 892 inside the chamber. In someembodiments, the battery operated controller 80 includes one or morebattery holders configured to retain the batteries and electricallyinterface with one or more features of the battery operated controller80.

Although not shown, the chamber 812 can also include electricalcircuitry for connecting with the batteries 892 so that the electricalcircuitry can draw power from the batteries 892. The battery operatedcontroller 80 also can have at least one (e.g., one, two, three, ormore) sealing ring(s) 820 to be mounted on the sealing section 814, anda sealing cap 840 having an inner wall surface (not shown) to engage thesealing section 814 and/or the sealing ring(s) 820 to provide sealing ofthe battery operated controller 80. The battery operated controller 80can further have a cap retainer 860 to retain the sealing cap 840 in asealed position and having internal threads 870 to engage the externalthreads 818 of the compartment body 800. The sealing cap 840, sealingretainer 860, and sealing portions of the compartment body 800 canoperate in the same or in a similar manner to the operation of thesealing cap 140, sealing retainer 160, and compartment body 100described above.

Turning to FIGS. 8A-B, the closed end 810 of the compartment body 800can further have a user interface, including but not limited to controlbuttons 895 and/or a display 896. Although not shown, the user interfaceof the compartment body 800 can be in an electrical connection with thecircuitry and the batteries 892 in the chamber 812. In someconfigurations, the battery operated controller 80 can allow irrigationto occur without tapping into an AC power. The battery operatedcontroller 80 can be installed in places where it is difficult toconnect the battery operated controller 80 to other sources of power(e.g., power lines). The sealing features of the battery operatedcontroller 80 can allow the battery operated controller 80 to beinstalled in environments exposed frequently to rain, flooding, and/ormud without affecting the electrical circuitry and the batteries 892sealed inside the chamber 812.

Wireless Battery-Operated Central Controller Assembly (BOCC)

In some embodiments, the electrical compartment 101 can be used in awireless battery-operated central controller assembly (BOCC) 11 in FIGS.10-12. The electrical compartment 101 is similar to the electricalcompartments 10, 20 of FIGS. 1-2 except as described below. Accordingly,features of the electrical compartment 101 can be incorporated intofeatures of the electrical compartments 10, 20 and features of theelectrical compartments 10, 20 can be incorporated into features of theelectrical compartment 101.

As shown in FIGS. 10-12, the BOCC 11 can include the watertightelectrical compartment 101, a transmitter housing 1085 for housingtransmitters 1086 (shown in FIG. 13) and coupled to an antenna dome1030, a lid retainer nut 1035, a flow sensor retainer cap 1036, a flowsensor 1032, and/or an electrical wire 1034 connecting the flow sensor1032 and the electrical compartment 101 in a manner described below. Inaddition, as described above, the BOCC 11 is a battery poweredirrigation controller that can be used to control multiple irrigationvalves to turn those irrigation valves on and off. The BOCC 11 is inwireless communication with a central computer. Irrigation programs andother commands for turning on and off the irrigation valves can beinitiated from the central computer. In some embodiments, at least oneirrigation program may be sent from the central computer to the BOCC 11and the BOCC 11 may store that irrigation program for future use. Insome embodiments, the BOCC 11 may turn individual valves on and off inaccordance with the stored irrigation programs. In some embodiments, theBOCC 11 can consume more power than the battery operated controller 80.In addition, the battery that can be sealed within the electricalcompartment 101 can be quickly depleted and may require frequentreplacements. Further, the electrical compartment 101 can already befilled with electronic components and/or circuitry possibly needed forcommunicating wirelessly with the central computer and have no sparespace for batteries. The BOCC 11 can thus have a separate battery pack1038 to be electrically connected to the electrical compartment 101 viaan electrical wire 1080 in a manner described below to meet the powerconsumption need of the BOCC 11.

As shown in FIG. 12, the battery pack 1038 can have a container forholding a battery retainer 1039. The batter pack 1038 and batteryretainer 1039 can be constructed from a polymer, a ceramic, a metal, acombination thereof, and/or any other suitable material. The batteryretainer 1039 can be sized, shaped, and configured to retain batterieshaving one or more different sizes and/or ratings. In the illustratedembodiment, the container and the battery retainer 1039 can havecomplementary shapes to minimize movement of the battery retainer 1039inside the container. For example, the container can have tracks on itsinner wall surface for guiding ridges on an outer surface of the batteryretainer 1039. The battery pack 1038 can also have a sealing cover 1033to provide watertight sealing (e.g., with O-rings) of the container. Abattery end 1087 of the wire 1080 can run through an opening 1031 of thesealing cover 1033 to contact the battery retainer 1039. A sealing capend 1081 of wire 1080 can also run through an opening 1082 (shown inFIG. 14) of the sealing cap 1040 of the electrical compartment 101 tocontact the electronic components and/or circuitry in the electricalcompartment 101. As shown in FIG. 12, the battery pack 1038 can alsohave a mounting ring 1037 that can be used to hang the battery pack 1138around the transmitter housing 1085. The mounting ring 1037 canadvantageously keep the battery pack 1038 within close proximity of theelectrical compartment 101, thereby reducing the danger of the batterypack 1038 moving further away from the electrical compartment 101 andtugging on the wire 1080.

Connection of the wire 1080 to the sealing cover 1033 and the sealingcap 1040 will now be described. FIGS. 13-14 illustrates how the sealingcap end 1081 of wire 1080 can be connected to the sealing cap 1040. Oneof ordinary skill in the art would appreciate from the disclosure hereinthat the wire 1080 can be connected to the sealing cover 1033 in same orin a similar manner to the connection of the wire 1080 and the sealingcap 1040 as described below.

As shown in FIGS. 13-14, the sealing cap 1040 can comprise the opening1082 for the electrical wire 1080 to pass through. As shown in FIG. 13,the wire 1080 can have a seal (e.g., an overmolded strain relief 1084)covering a portion of the wire 1080 at a sealing cap end 1081 of thewire 1080. The portion of the wire 1080 covered by the overmolded strainrelief 1084 can be passed through the opening 1082 on the closed end1046 of the sealing cap 1040. As shown in FIGS. 13 and 14, the sealingcap 1040 can have a filling well 1092 facing an open end 1044 of thesealing cap 1040. After the portion of the wire 1080 covered by theovermolded strain relief 1084 is passed through the opening 1082, thefilling well 1092 can be filled with a sealing material to seal any gapbetween the opening 1082 and the overmolded strain relief 1084 so as toprevent water or mud ingress into the cap 1040 and to fix the wire 1080to the sealing cap 1040. In some embodiments, the sealing material canbe a polyurethane encapsulating compound. The strain relief 1084 canadvantageously provide a transition from the flexible wire 1080 to arigid connection point at the opening 1082 of the sealing cap 1040. Moreparticularly, the strain relief 1084 can prevent any mechanical forceapplied to an exterior of the wire 1080 from being transferred to therigid connection point at the opening 1082 of the sealing cap 1040,thereby reducing failure of the wire 1080. In the illustratedembodiment, the electrical wire 1080 can terminate at an electricalconnector 1090 after the wire 1080 is passed through the cap 1040. Theelectrical connector 1090 can be connected to electrical components orcircuitry housed in the chamber. In some embodiments, the wire 1080 canadvantageously deliver power to electrical components or circuitry inthe chamber.

Returning to the electrical compartment as shown in FIG. 12, besides thesealing cap 1040, the electrical compartment 101 can have a compartmentbody 1000, at least one (e.g., one, two, three, or more) sealing ring(s)1020, and a cap retainer 1060. The electrical component 101 can besealed in a manner described above in connection with the electricalcompartments 10, 20. For example, the sealing cap 1040, sealing retainer1060, and sealing portions of the compartment body 1000 can operate inthe same or in a similar manner to the operation of the sealing cap 140,sealing retainer 160, and compartment body 100 described above.

The electrical compartment 101 can further have connecting terminals1077 exiting from the compartment body 1000. The connecting terminals1077 can connect to at least one irrigation valve. In some embodiments,there may be more connecting terminals 1077 to individually connect tomore irrigation valves, (e.g., two, three, four, or more irrigationvalves). In some embodiments, the BOCC 11 maybe able to control eachirrigation valve individually via programming or other commands sentfrom the central computer.

In some embodiments, the electrical compartment 101 can have connectingterminals 1079 exiting from the compartment body 1000. In someembodiments, the connecting terminals 1079 may be supplied as a loop, orotherwise connected together, to allow the controller to operate withoutan optional sensor. In other embodiments, the connecting terminals 1079may be separated and connected to an optional sensor, such as a rainshut off sensor, a temperature sensor, or other sensors that may be usedto inhibit and/or allow irrigation. For example, a user may cut a loopedterminal 1079 and connect the open loop to a sensor (e.g., a rain shutoff sensor). The rain sensor can be configured to close the loop in theabsence of rain and open the loop in the presence of rain. Opening theloop can inhibit or prevent operation of the one or more irrigationvalves. This functionality can reduce the likelihood that irrigationtakes place during rain. The electrical compartment 101 can further haveconnecting terminals embedded into the wire 1034 exiting from thecompartment body 1000. The wire 1034 can connect to a flow sensor 1032.The flow sensor 1032 can have similar functions as the flow sensor 32shown in FIGS. 4A-4C and be mounted on a main water pipe as describedabove. The connecting terminals 1077 can also connect to other parts ofthe irrigation devices and/or to a central computer.

With continued reference to FIG. 12, a first end of the transmitterhousing 1085 can be position on a closed end 1006 of the compartmentbody 1000. In some embodiments, the transmitter housing 1085 can form anintegral part with the compartment body 1000. In other embodiments, thetransmitter housing 1085 can be mechanically coupled (e.g., welded,adhered, fastened, and/or otherwise coupled) to the compartment body1000. As shown in FIG. 13, the electrical connector 1090 can connect thewire 1080 to a controller circuitry 1095 inside the water electricalcompartment 101, which can advantageously protect the controllercircuitry 1095 from water, mud, dirt, and the like. In the illustratedembodiment, the controller circuitry 1095 can be attached to an innerwall of the closed end 1006 of compartment body 1000 defining a ceilingof the chamber 1012. The controller circuitry 1095 can also beelectrically coupled to the transmitters 1086. The transmitters 1086 canadvantageously send ON/OFF and/or other control signals to irrigationdevices. In some embodiments, the housing 1085 can house receivers (notshown). In some embodiments, the housing 1085 can house both thetransmitters and receivers, or transceivers to advantageouslycommunicate wirelessly with irrigation devices. The BOCC 11 can have adetachable dome 1030 to facilitate mounting the BOCC 11 to a lid of anirrigation box. The detachable dome 1030 can be mechanically attached toa second end of the transmitter housing 1085. In some embodiments, thedetachable dome 1030 can incorporate internal threads that canthreadedly mate with external threads 1088 on an outer wall surface ofthe transmitting housing 1085.

The lid retainer nut 1035 can be used to mount the electricalcompartment 101, the transmitters 1086 in the transmitter housing 1085,and the detachable dome 1030 on a plastic lid of a valve box (notshown). As shown in FIG. 13, the lid retainer nut 1035 can have internalthreads 1089 that can threadedly mate with the external threads 1088 ofthe transmitter housing 1085. In some embodiments, the external threads1088 can be custom threads having any desired size and/or tolerance.Installation of the BOCC 11 may be accomplished by removing thedetachable dome 1030 and inserting the transmitter housing 1085 througha hole in the lid of a valve box. The detachable dome 1030 may then bereinstalled and tightened until hand tight. Tightening of the retainernut 1035 may be performed to complete the installation, and reopening ofthe electrical compartment 101 can be in similar manners as describedabove regarding the WFS assembly 3.

Although this disclosure has been described in the context of certainembodiments and examples, it will be understood by those skilled in theart that the disclosure extends beyond the specifically disclosedembodiments to other alternative embodiments and/or uses and obviousmodifications and equivalents thereof. In addition, while severalvariations of the embodiments of the disclosure have been shown anddescribed in detail, other modifications, which are within the scope ofthis disclosure, will be readily apparent to those of skill in the art.Sensors other than flow sensors may be incorporated into any of theabove mentioned devices. Other sensors may include soil moisturesensors, temperature, solar radiation, light, humidity, wind, and/or anyother sensors that monitor irrigation efficiency, weather, plantconditions, or soil conditions. It is also contemplated that variouscombinations or sub-combinations of the specific features and aspects ofthe embodiments may be made and still fall within the scope of thedisclosure. For example, features described above in connection with oneembodiment can be used with a different embodiment described herein andthe combination still fall within the scope of the disclosure. It shouldbe understood that various features and aspects of the disclosedembodiments can be combined with, or substituted for, one another inorder to form varying modes of the embodiments of the disclosure. Thus,it is intended that the scope of the disclosure herein should not belimited by the particular embodiments described above. Accordingly,unless otherwise stated, or unless clearly incompatible, each embodimentof this invention may comprise, additional to its essential featuresdescribed herein, one or more features as described herein from eachother embodiment of the invention disclosed herein.

Features, materials, characteristics, or groups described in conjunctionwith a particular aspect, embodiment, or example are to be understood tobe applicable to any other aspect, embodiment or example described inthis section or elsewhere in this specification unless incompatibletherewith. All of the features disclosed in this specification(including any accompanying claims, abstract and drawings), and/or allof the steps of any method or process so disclosed, may be combined inany combination, except combinations where at least some of suchfeatures and/or steps are mutually exclusive. The protection is notrestricted to the details of any foregoing embodiments. The protectionextends to any novel one, or any novel combination, of the featuresdisclosed in this specification (including any accompanying claims,abstract and drawings), or to any novel one, or any novel combination,of the steps of any method or process so disclosed.

Furthermore, certain features that are described in this disclosure inthe context of separate implementations can also be implemented incombination in a single implementation. Conversely, various featuresthat are described in the context of a single implementation can also beimplemented in multiple implementations separately or in any suitablesubcombination. Moreover, although features may be described above asacting in certain combinations, one or more features from a claimedcombination can, in some cases, be excised from the combination, and thecombination may be claimed as a subcombination or variation of a subcombination.

Moreover, while operations may be depicted in the drawings or describedin the specification in a particular order, such operations need not beperformed in the particular order shown or in sequential order, or thatall operations be performed, to achieve desirable results. Otheroperations that are not depicted or described can be incorporated in theexample methods and processes. For example, one or more additionaloperations can be performed before, after, simultaneously, or betweenany of the described operations. Further, the operations may berearranged or reordered in other implementations. Those skilled in theart will appreciate that in some embodiments, the actual steps taken inthe processes illustrated and/or disclosed may differ from those shownin the figures. Depending on the embodiment, certain of the stepsdescribed above may be removed, others may be added. Furthermore, thefeatures and attributes of the specific embodiments disclosed above maybe combined in different ways to form additional embodiments, all ofwhich fall within the scope of the present disclosure. Also, theseparation of various system components in the implementations describedabove should not be understood as requiring such separation in allimplementations, and it should be understood that the describedcomponents and systems can generally be integrated together in a singleproduct or packaged into multiple products.

For purposes of this disclosure, certain aspects, advantages, and novelfeatures are described herein. Not necessarily all such advantages maybe achieved in accordance with any particular embodiment. Thus, forexample, those skilled in the art will recognize that the disclosure maybe embodied or carried out in a manner that achieves one advantage or agroup of advantages as taught herein without necessarily achieving otheradvantages as may be taught or suggested herein.

Conditional language, such as “can,” “could,” “might,” or “may,” unlessspecifically stated otherwise, or otherwise understood within thecontext as used, is generally intended to convey that certainembodiments include, while other embodiments do not include, certainfeatures, elements, and/or steps. Thus, such conditional language is notgenerally intended to imply that features, elements, and/or steps are inany way required for one or more embodiments or that one or moreembodiments necessarily include logic for deciding, with or without userinput or prompting, whether these features, elements, and/or steps areincluded or are to be performed in any particular embodiment.

Language of degree used herein, such as the terms “approximately,”“about,” “generally,” and “substantially” as used herein represent avalue, amount, or characteristic close to the stated value, amount, orcharacteristic that still performs a desired function or achieves adesired result. For example, the terms “approximately”, “about”,“generally,” and “substantially” may refer to an amount that is withinless than 10% of, within less than 5% of, within less than 1% of, withinless than 0.1% of, and within less than 0.01% of the stated amount.Additionally, as used herein, “gradually” has its ordinary meaning(e.g., differs from a non-continuous, such as a step-like, change).

The scope of the present disclosure is not intended to be limited by thespecific disclosures of preferred embodiments in this section orelsewhere in this specification, and may be defined by claims aspresented in this section or elsewhere in this specification or aspresented in the future. The language of the claims is to be interpretedbroadly based on the language employed in the claims and not limited tothe examples described in the present specification or during theprosecution of the application, which examples are to be construed asnon-exclusive.

What is claimed is:
 1. A watertight electrical compartment of anirrigation device, comprising: an electrical compartment body comprisinga chamber with an open end, and an outer wall surface having externalthreads and a sealing section, the sealing section located closer to theopen end of the chamber than the external threads; at least one sealingring having a diameter configured for mounting on the sealing section; acap having an open end, a closed end, and an internal diameterconfigured to have a sliding fit with the sealing section and aninterference fit with the sealing ring when the sealing ring is mountedon the sealing section; and a cap retainer having internal threadsconfigured to threadedly mate with the external threads of thecompartment body, the cap retainer further having first and second ends,the cap retainer configured to receive at least a portion of the capthrough the first end.
 2. The watertight electrical compartment of claim1, wherein the cap has a non-threaded inner wall.
 3. The watertightelectrical compartment of claim 1, wherein an inner wall of the capretainer further comprises a non-threaded portion further away from thefirst end of the cap retainer than the inner threads.
 4. The watertightelectrical compartment of claim 1, wherein the cap has a reduced outerdiameter on its closed end and the cap retainer has a reduced innerdiameter on its second end, the reduced inner diameter of the capretainer configured to slidably accommodate the reduced outer diameterof the cap.
 5. The watertight electrical compartment of claim 1, whereinthe cap retainer has a shoulder at its second end having an internaldiameter smaller than an outer diameter of the cap, the shoulderconfigured to keep the cap engaged with the sealing section when theinternal threads of the cap retainer mates with the external threads ofthe compartment body.
 6. The watertight electrical compartment of claim1, wherein a wall of the cap further comprises at least one notch at theopen end.
 7. The watertight electrical compartment of claim 1, whereinthe sealing section comprises at least one groove configured to receivethe at least one sealing ring.
 8. The watertight electrical compartmentof claim 1, further comprising a plurality of sealing rings positionedbetween the cap and the outer wall surface of the electrical compartmentbody.
 9. The watertight electrical compartment of claim 1, wherein thechamber of the compartment body is configured to house at least onebattery.
 10. The watertight electrical compartment of claim 9, whereinthe chamber comprises battery contacts.
 11. The watertight electricalcompartment of claim 9, wherein the chamber comprises a DIP switch. 12.The watertight electrical compartment of claim 9, wherein the chambercomprises flash programming pads.
 13. The watertight electricalcompartment of claim 1, wherein the compartment is configured to beelectrically coupled to a flow sensor.
 14. The watertight electricalcompartment of claim 1, wherein the sealing ring is resilient.